Scraper



'- N. P- SLATE.

1 SCRAP-ER.

APPLICATION FILED JUNE 5, 1920.

1,407, 3, Patented Feb. 21, 1922.

3 SHEETS-SHEET l.

N. P. SLATE.

SCRAPER.

APPLICATION FILED JUNE 5, 1-920.

V 1,407,683. 7 Patented Feb. 21, 1922.

3 SHEETSSHEET 2- N. P. SLATE.

SYCRAPER.

APPLICATION FILED JUNE 5,1920.

Patented Feb. 21, 1922.

3 SHEETS-SHEET 3- awueutoz lV-P- 5561/56 Am w W lilNlTED STATES PATENT OFFICE.

NATHANIEL P. SLATE,

OF TANGENT, OREGON.

SCRAPER.

actose.

Application filed June 5,

To all whom it may concern.

Be it known that I, NA'll-IANIEL P. SLATE, a citizen of the United States, residing at Tangent, in the county of Linn and State of Oregon, have invented certain new and useful Improvements in Scrapers, of which the following is a specification.

This invention relates to excavating scrapers and seeks primarily to simplify the construction of such implements whereby the cost of manufacture will be reduced and the operation simplified. The invention also seeks to so construct a scraper that there will be no loss of efiiciency and a load may be taken up, transported, and dumped with less labor than with similar devices heretofore produced, and the invention also has for its object the provision of a construction which will be strong and durable.

The invention is illustrated in the accompanying drawings, in which Figure l is a side elevation of a scraper embodying the improvements, the ull lines showing the device in the position assumed then taking up a load ant the dotted lines showing the position when the load is being transported Fig. 2 is a similar view showing the man nor of dumping a load;

Fig. 8 is a plan view;

Fig. t is a rear elevation;

Fig. 5 is an enlarged longitudinal section of a portion of the tongue;

6 is a detail transverse section on the line 6-6 of 5.

Figs. 7 and 8 are elevations showing an-- other embodiment of the invention.

The scoop or scraper body may be con ieniently formed of a single blank present ing a bottom plate 1, a back plate 2 and side wings 3, the back plate and the side wings being; folded into upright positions relative to the bottom, and the side wings being of such length that their rear extremities will present lips l which may be folded against the upturned back plate and riveted or otherwise rigidly secured thereto. To the back plate I secure spaced standards 5 which co verge upwardly and are preferably formed of angle bars, as shown, so that they will very effectually reinforce the back plate and prevent buckling of the same. These standards have their lower portions turned under the bottom of the scoop w iereby they will form runner extensions 6 and wooden. runner bars 7 may be secured to the said run- Specincation of Letters Patent.

Patented Feb. 21, 1922.

1920. Serial No. 386,893.

ner extensions to provide a broader bearin upon the ground and reduce the wear upoh the metallic members. The front ends of the runner bars 7 and of the runner extensions 2 are, of course, beveled, as shown at 8, to more readily pass over the ground and also to jli".?l.lll31t6 the taking up of a load, as shown n 1 and as will. be presently more particularly described. The lower forwardly pro ecting extensions 6 of the standards 5 reinforce and prevent buckling of the bot tom plate 1 or the scoop and constitute the main support therefor so that the said plate will not run directly upon the ground and wear upon the same will be overcome so that the life of the scoop will be prolonged. As shown at 9 the standards 5 extend above the upper edge ofthe bacl: plate 2 and are more sharply converged, the extremities being turned into vertical planes and disposed par allel, as shown at 10 to receive between them the rear extremity oi. a tongue 11. The rear ad of the tongue may be reinforced by a metallic strap 12, as shown, and it is pivotally held between the members 10 by pivot bolt 13. The draft tongue is 01 the usual ii'orin and dimensions and is provided at its front extremity with a clevis 14: whereby it may be coupled to a tractor.

To the front side of the back plate 2, at the ends and at or adjacent the upper edge thereof, 1 secure arms 15 which are prefera y flat bars projecting forwardly from the l l: plate. These are provided with a plurality of openings therethrough and ,elters 16 are secured to the said arms by inserted through suit ole openings {66kt}? members and alined openings arms so that the combined length of as and the rocker members may he stez'l to regulate the depth oi" the dirt road when the scraper discharges. The forward ends or extremities oi the rocker members 16 are curved downwardly and are 1 at the rear ends 016' a draft bail 22 which ative to the draft tongue.

strain imposed upon it and the scoop caused to travel in the direct line of draft. By reference to Figs. 1 and 2 of the drawings it will be noted that the rod or bar is secured at its ends to the tongue and is spaced there from by washers or spaced blocks 25 so that the front end of the bail 22 rides practically in longitudinal slot of the draft-ap 'ilylng member of the machine.

To retain the scoop in position to take up a load or to support a load for transportation, I mount upon the tongue, near the front end thereof, a plurality of dogs which are adapted to engage and hold the front end of the draft bail 22. One of these dogs, 26, consists of a relatively long lever pivoted at its front end upon a pin or bolt 27 disposed transversely through the tongue and passing through a longitudinal slot 28 in the tongue in which the said lever or dog is housed, the rear free end of the dog being somewhat widened, as shown at 29, to form practically a hook adapted to engage the front end of the draft bail as will be readily understood and as shown in 1. This lever ordog may rest upon the rod or bar 23 and is also partly supported by a second dog 30 which is disposed within the longitudinal slot 28 of the tongue below the said dog or lever 26 and is pivoted as at 31, in rear of the pivot 27. The rear free end of the dog or lever 30 also projects downwardly, as shown at 82, to extend below the tongue and normally rest upon thebar or rod 23. This second smaller dog is equipped nearits' forward end with a lever 35 rigid with the side of the dog and having one end projecting above the tongue where it I may be conveniently manipulated, the pivot of the dog being the fulcrum of the lever 85 and the two parts 30 and 35 con- ,tituting a bell crank lever. 4

It is thought the manner of using the described device will be readily understood. When a load is to be taken up, the bail 22 is engaged with the hook 29 so that the parts will be in the position shown in full lines in Fig. 1. The scraper is then drawn over the ground and the front edge of the bottom plate 1 will cut into the surface so that thesurface soil will be taken up by the scoop. When the scoop has been filled, the lever is rocked so as to lift the extremity .82 of the forward dog and the tractor is then backed slightly so that the tongue 11 will move rearwardly relative to the bail 22, the weight of the load holding the scoop against rearward movement over the surface of the ground and thereby causing the front end of the bail to ride forward to a position in advance of the holding extremity 82 of the dog 30. The rearward movement of the tongue will impart a slight rocking movement to the scoop so that it will assume the position shown in dotted lines in Fig. 1 and will then support the load in position to be moved to a point of discharge. When the frontend of the bail has reached a point in advance of the dog 30, the lever 35 is released whereupon the dog will as same its normal position and will engage the front end of the bail so'that if the scraper be then again drawn forward the loaded scoop will be drawn over the ground without being discharged and without the scraper body taking into thesurface of the soil. lVhen' the point of discharge has'becn reached, the lever 35 is again rocked and this time it should be rocked to the limit raised to such an extent as'to lift the dog or lever 26 out of the path of the bail. If the forward movement of the device he continued, the tongue will be drawn forre rd while the weight of the load will hold the scraper body relatively stationary where'- of its movement so that the dog 30 will be upon the bail will ride re-arwardly upon the rod or bar 23. The relative rearward movement of the bail will continue-until the front end thereof reaches the rear spacer or washer by which it will earrested, but in the meanwhile the draft will be applied through the tongue to the pivot bolt 13 and a for- "aid movement will 'beapplied through said bolt to the unoer extremities of the standards 5 which will result in the scoop or v scraper body being tilted and caused to root: upon the curved extremitiesof the members 16, asshown in Fig. 2, with the result that the load will be discharged. The entire device then drawn forward, while resting upon the rocker members 16, until it is clear of the discharged load, after which the parts are returned to the position shown in dotted lines in Fig. 1 and drawn. back to the place where excavating is to be done. The lever is then rocked to raise the dog 30 clear of the bail whereupon the deviceis driven forward and, as soon as the bail has passed in rear of the holding lip 32 of said dog, the lever is released so that the book 29 of the dog 26 will be interposed in the path of the bail and will arrest the relative movement thereof and thereby restore the V end and the pivot'bolt42 plays in said slot instead of being fixed in place as is the case with the pivot bolt 13 in the previously de scribed form of the apparatus. To the ends of the bolt 42 are pivoted the rear ends of links 43 which extend longitudinally of the tongue and have their front ends pivoted to a hand lever 4 f fulcrumed upon the tongue. Preferably, the slot 28, shown in Fig. 5, will be elongated to receive the lever l-t which is equipped with a latch 45 cooperating with a segmental rack 46 secured upon the tongue. The scoop and the draft devices are of the same construction as in the form previously described.

The adjusting mechanism shown in Figs. 7 and 8 gives a more flexible control of the scoop and permits it to be adjusted without stopping.

My improved scraper is exceedingly simple in the construction and arrangement of its parts and may, therefore, be produced at a low cost. It is easily manipulated and is efiicient in operation.

Having thus described the invention, what is claimed as new is:

1. A. scraper comprising a scoop, a draft tongue having a pivotal connection with the back of the scoop, a draft-applying device pivotally connected at its rear end with the front of the scoop, and means on the tongue to engage the front end of said draft-applying device and hold it in a set position.

2. A scraper comprising a scoop, a draft tongue having a pivotal connection with the back of the scoop, and a draft-applying device having its rear end pivotally connected with the front of the scoop and having its front end connected with and adjustable longitudinally of the draft tongue.

3. In a scraper, the combination of a scoop, a tongue having a pivotal connection with the back of the scoop, a draft-applying device pivotally attached to the front of the scoop and having a slidable connection with the tongue, and means on the tongue to engage said draft-applying device and hold it at a desired point of the tongue.

In a scraper, the combination of a. scoop, a tongue having a pivotal connection with the back of the scoop, a bar secured to the under side of the tongue and extending longitudinally thereof, a draftapplying member pivotally attached to the front of the scoop and resting upon said bar, and a plurality of holding devices on the tongue near the front end of said bar to separately enga e said draft-applying device.

5. ...n a scraper, the combination of a scoop, a tongue having a pivotal connection with the back of the scoop, a bail pivoted to the front of the scoop and slidably supported on the tongue, and a plurality of dogs mounted on the tongue and each adapted to at times engage the bail.

6. In a scraper, the combinatoin of a scoop, a tongue having a pivotal connection with the back of the scoop, a bail pivoted to the front of the scoop and slidably supported on the tongue, a dog pivoted on the tongue and adapted to engage said bail, a second dog pivoted on the tongue under the first dog and adapted to lift the same and also adapted to engage the bail, and means connected with the second-mentioned dog to operate the same.

7. In a scraper, the combination of a scoop, a draft tongue having a pivotal connection with the back of the scoop, a bail pivoted the front of the scoop and having slidable connection with the tongue, a dog pivoted on the tongue and having its rear free end adapted to engage the bail, a second dog pivotally mounted on the tongue below the first-mentioned dog and having its free end adapted to engage the bail, the pivot of the second dog being in rear of the pivot of the first dog and the two dogs being in the same vertical plane, and an operating lever pivoted upon the tongue concentric with the second dog and connected thereto.

8. In a scraper, the combination of a scoop, standards secured to the back of the scoop and having their lower portions extended under and secured to the scoop thereby forming runners, the upper ends of the standards being projected above the scoop, a draft tongue pivotally mounted between the upper extremities of said standards, a draft-applying member pivoted to the front of the scoop, and means on the tongue to engage said draft-applying member.

9. In a scraper, the combination of a scoop comprising a bottom, sides and a back plate, a draft tongue having a pivotal con-- nection with the back plate, extensible rock ers secured to the baclr plate and to the sides of the scoop, a draft-applying device piv otally connected with the front of the scoop, and means on the tongue for engaging said draft-applying device.

10. A scraper comprising a scoop, a draft tongue having a pivotal connection with the back of the scoop, a draft-applying device connected with the front of the scoop, and means for adjusting the pivotal connection 'ith the back of the scoop longitudinally of the tongue.

In testimony whereof I aflix my signature.

NATHANIEL P. SLATE. [n s] 

